Knick Portavo 902 PH Instructions page 5

All manuals and user guides at all-guides.com
Start-Up
Connecting a Sensor
The Portavo 902 PH provides several connections so that many types of sensors
can be used for measurement. Note that only one sensor may be connected to the
meter at a time. The meter automatically recognizes a connected Memosens sensor
and switches accordingly. Memosens is signaled in the display.
Separate temperature probe
After power-on, a separate temperature probe is automatically recognized.
When you want to replace the temperature probe, you must switch off the meter
and then switch it on again.
Caution!
Always make sure that a sensor is connected to the meter before
starting measurement.
Explanation: The analog pH input of the Portavo is an electrometer
amplifier with an extremely high-impedance. When the sensor is not
in contact with the medium or not connected to the meter, electric
charges on the input can generate arbitrary, stable pH or mV values
which will be shown in the display.
Memosens sensors have a cable coupling, which allows convenient replacement
of sensors while the cable remains connected to the meter. The connecting cable is
connected to socket a (M8, 4 pins for Memosens sensors).
a b c d
Connections
a - M8, 4 pins for Memosens sensors
b - Temperature probe GND
c - Temperature probe
d - pH socket (DIN 19 262)
5